Collection material such as alcohol swabs should be lead-free. Use powder-free gloves or rinse the powder off with tap water. For capillary collection, wash hands thoroughly with soap and dry with clean, low-lint towel. Once washed, fingers must not come into contact with any surface, including the other fingers. Clean skin prior to venipuncture with the lead-free alcohol swab. Avoid hemolysis. Avoid worksite collection.